Oven heating unit



Jan. l0, 1956 c. c. AVERILI. ETAL OVEN HEATING UNIT Filed Jan. 19, 1953 ATTOR/Vff United States Patent OVEN HEATING UNIT Charles C. Averill, Albion, and Harold W. Tuttle, Jr.,

Adrian, Mich., assiguors to Union Steel Products Company, Albion, Mich., a corporation of Michigan Application January 19, 1953, Serial No. 332,026

6 Claims. (Cl. 219-19) This invention relates to improvements in heating units for ovens and the like and clips or holders for peripherally ribbed insulators.

The main objects of this invention are:

First, to provide a heating element unit for ovens and the like in which the insulators for the heating element are effectively secured in position and guarded without clamping stress thereon.

Second, to provide a heating unit of this character and an insulator holder therefor which is effective in supporting the insulators and at the same time it is light in weight and the parts are economical and easily assembled.

Objects relating to details and economies of the invention will appear from the description to follow. The invention is defined and pointed out in the claims.

A preferred embodiment of the invention is illustrated in the accompanying drawing, in which:

Fig. 1 is a plan view of an oven heating unit embodying my invention.

Fig. 2 is a cross sectional view thereof on a line corresponding to line 2 2 of Fig. 1.

Fig. 3 is an enlarged fragmentary view partially in section on line 3 3 of Fig. 4.

Fig. 4 is a fragmentary view partially in section on a line corresponding to 4 4 of Fig. 3.

Fig. 5 is a fragmentary view illustrating certain steps in the assembling of the heating unit.

In the structure illustrated in the accompanying drawing the frame comprises side members 1 1, the frame members 2 connected to the front ends of the side members and rear members 4, 4. The frame also includes the cross members 5, 5 extending between the side members.

In the structure illustrated pairs of longitudinally disposed support rods 6, 6 and 7, 7 are provided. The rods 7 have crossarms 8 securing intermediate their ends to the rods 7, that is, they extend transversely at both sides of the rod 7. The rods 6 have arms 9 secured thereto to extend inwardly therefrom. The front member 2 of the frame has arms 10 corresponding to the arms 9. The supporting plate 11 is provided for the connector elements which are not shown as they have no relation to the insulator mounting features of the unit other than providing connections for the resistor elements indicated at 12. It will be understood that the resistor element is roved back and forth through the insulators 13. The insulators 13 are commonly formed of molded porcelain or other heat resisting insulating material and are provided with peripheral ribs 14.

The arms 8 and 9 are formed of bendable strips of metal of channel section, desirably of V section as illustrated. The arms are conformed to provide offset loops at their ends with the channel facing inwardly to embracingly receive the insulators with their ribs 14 within the channels.

In the embodiment illustrated the loops are offset up- ICC wardly relative to the shank portions of the crossarms or holders. The width of the crossarms approximates that of the insulators so that there are no substantial projecting parts of the insulator that are likely to strike some object in the handling of the unit.

In Fig. 5 we illustrate a step in the assembly of the structure. The crossarms are initially formed as offset loops as shown in this gure. The insulators 13 are then dropped into the loops as is indicated in Fig. 5. The ends 16 of the loops are then closed around the insulators. The loops may all be closed simultaneously.

It will be noted that with the offset loops as shown and the loops retainingly embracing the insulators, the insulators are fully guarded by the holders and the supporting parts of the unit frame.

We have not attempted to illustrate or describe other embodiments or adaptations of our invention, particularly in the matter of the type of unit, or adapting it for broilers, ovens or heaters of different design as it is believed this disclosure will enable those skilled in the art to embody or adapt our invention as may be desired.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

l. A frame for supporting a heating unit resistor comprising spaced frame members, a cross rod xedly secured to said frame members, a plurality of cross arms of bendable stock of transversely V shaped cross section secured transversely to said cross rod and longitudinally conformed at their outer ends into insulator embracing loops of over of arc with the V section facing inwardly of the loops, said loops being offset from the mid-portions of the cross arms oppositely from the cross rod, and insulators having peripheral ribs retainingly embraced by said loops with their ribs within the V section of the arms.

2. A frame for supporting a heating unit resistor comprising a support rod, a plurality of cross arms of bendable metal stock of channel shaped transverse section ixedly secured to the rod in spaced relation to each other, said arms terminating in loops of over 180 and being bent longitudinally of the arms with the channels facing inwardly, and peripherally ribbed insulators retainingly embraced by said loops with the ribs of the insulators within the channels.

3. A frame for supporting a heating unit resistor comprising a support member and an insulator holder of bendable stock of channel shaped transverse cross section xedly secured transversely to the support member and conformed longitudinally into an insulator embracing loop of over 180 arc at one end with the channel facing inwardly of the loop, and an annular insulator having a peripheral rib retainingly disposed within the loop with its rib within the channel.

4. A heating unit resistor support comprising a support member, an insulator holder of bendable metal stock of transverse channel section xedly secured transversely to the support member and projecting transversely therefrom, said holder being conformed longitudinally at its outer end into a loop of over 180 arc with the channel facing inwardly of the loop, and a flat annular insulator having a transversely convex periphery retainingly embraced within the channel of the loop, the thickness of the insulator being approximately the width of the holder whereby the holder constitutes a guard for the insulator.

5. A heating unit resistor support comprising a support member, an insulator holder of bendable metal stock of transverse channel section lixedly secured transversely to the support member and projecting transversely therefrom, said holder being conformed longitudinally at its outer end into a loop of over 180 arc with the channel facing inwardly of the loop, and a at annular insulator having a transversely convex periphery retainingly embraced within the channel of the loop.

6. A heating unit resistor support comprising a support member, an insulator holder of bendable metal stock of transverse channel section xedly secured transversely to the support member and projecting transversely therefrom, said holder being conformed longitudinally at its outer end into a loop of over 180 arc with the channel facing inwardly of the loop, and a at annular insulator retainingly embraced within the chan nel of the loop, the thickness of the insulator being approxmately the width of the holder whereby the holder constitutes a guard for the insulator.

References Cited in the le of this patent UNITED STATES PATENTS AMALH 

